Dr. Rani J R

Assistant Professor, Research Guide

Department of Physics

@ ranijr210_at_gmail.com

# +91999.500.9605

Academic Qualifications

  • M.Sc in Physics – University College, Thiruvananthapuram (University of Kerala) – 1999-2001
  • UGC NET in Physics – 2001
  • GATE (Physics) – 2003
  • PhD in Optoelectronics – Department of Optoelectronics, University of Kerala (2009).

Area of Interest (Research)

  • Supercapacitors, neuromorphic memory devices, resistive random access memories, graphene – based electronic devices

Experience

  • Postdoctoral research – Yonsei University, Seoul, South Korea and Gwangju Institute of Science and Technology (GIST), Gwangju, South Korea.
  • Assistant Professor of Physics under the Directorate of Collegiate Education, Kerala, since 2007

Awards/Fellowships

  • Outstanding woman scientist, 2024, Venus International Foundation, Tamilnadu, India
  • Nanomaterials -2021 Best Paper Award
  • Honorary Best Researcher Award by Gwangju Institute of Science and Technology, South Korea (2020)
  • Brain Korean Fellowship (BK-21) for postdoctoral studies in Yonsei University, Seoul, South Korea (2011)
  • Young Scientist award in physics for the best research work done in nanotechnology, Govt. of Kerala (2007)
  • Best poster award, National Laser Symposium , RRCAT, Indore (2006)
  • CSIR – SRF in physical science for the research work by Council of Scientific and Industrial Research (CSIR), Govt. of India, New Delhi ( 2007)
  • Jawaharlal Nehru Scholarship for doctoral studies by Jawaharlal Nehru Memorial Fund – New Delhi (2005)

Patents

  • Nonvolatile memory device having multi-level resistance and capacitance characteristics, and manufacturing method thereof, JH Jang, Rani Anoop, SI Oh, Patent Registration No: US 11,251,371 B2, United States (2022)
  • ReRAM using stack of iron oxide and graphene oxide films, JH Jang, Rani Anoop, SI Oh, Patent Registration No: US 10 , 038 , 140 B2, United States (2022)
  • Stacking of Iron oxide graphene oxide: JH Jang, Rani Anoop, SI Oh, Patent Registration No:1018693780000, South Korea (2018)
  • High energy density supercapacitors assisted by light-induced charging, J H Jang and Rani Anoop, United States (2024) (patent to be filed)
  • Optoelectronic resistive random access memories with excellent primary colors-sensitivity towards neuromorphic computing, J H Jang and Rani Anoop, United States (2024) (patent to be filed)

Books (Edited/Chapters)

  • Graphene‐Based Scroll Structures: Optical Characterization and Its Application in Resistive Switching Memory Devices, Handbook of Graphene, Volume 4: Composites, 261, J.R Rani and J.H Jang, John Wiley & Sons (2019) (Invited)
  • Published a Malayalam poetry collection “ Nilavudichappol”

Journal Publications

1. Realizing high energy density supercapacitors assisted by light-induced charging,
Janardhanan R Rani, Nayan Chandra Das, Minjae Kim, Ranjith Thangavel, Sung Tae Kim, Yun Sung Lee, Jae-Hyung Jang, Journal of Power Sources 576, 233197, 2023
2. Low-temperature characteristics of resistive switching memory devices based on reduced graphene oxide-phosphor composites toward reliable cryogenic electronic devices
J.R. Rani, N.C Das, M. Kim, J.H. Jang, Carbon 195, 174-182, 2022
3. Effects of the Operating Ambiance and Active Layer Treatments on the Performance of Magnesium Fluoride Based Bipolar RRAM, N. C. Das, M. Kim, D. Kwak, J.R. Rani, SM Hong, JH Jang, Nanomaterials 12 (4), 605, 2022
4. Low-temperature characteristics of magnesium fluoride based bipolar RRAM devices
N.C Das, M. Kim, J. R. Rani, S. M. Hong, JH Jang, Nanoscale 14 (10), 3738-3747,2022
5. Plasmonic DSSC performance of spray deposited Ag-ZnO and Au-ZnO films
N. L Tarwal, V, L Patil, J. R. Rani, K.V. Gurav, J. S. Shaikh, MS Khandekar, Chinese Journal of Physics 73, 581-588, 2021
6. Electroforming-Free Bipolar Resistive Switching Memory Based on Magnesium Fluorid NC Das, M Kim, JR Rani, SM Hong, JH Jang, Micromachines 12 (9), 1049, 2021
7. Ultra-High Energy Density Hybrid Supercapacitors Using MnO2/Reduced Graphene Oxide Hybrid Nanoscrolls, JR Rani, R Thangavel, M Kim, YS Lee, JH Jang, Nanomaterials 10 (10), 2049, 2020
8. Multilevel bipolar electroforming-free resistive switching memory based on silicon oxynitride,
NC Das, SI Oh, JR Rani, SM Hong, JH Jang, Applied Sciences 10 (10), 3506 ,2020
9. An ultra-high energy density supercapacitor; fabrication based on thiol- functionalized graphene oxide scrolls
J. R Rani, Ranjith Thangavel, Se-I Oh, Yun-Sung Lee, and Jae-Hyung Jang, Nanomaterials 9 (2), 148, 2019
10. High Volumetric Energy Density Hybrid Supercapacitors Based on Reduced Graphene Oxide Scrolls
J. R Rani, Ranjith Thangavel, Se-I Oh, Jeong Min Woo, Nayan Chandra Das, So-Yeon Kim, Yun-Sung Lee, Jae-Hyung Jang, ACS applied materials & interfaces 9 (27), 22398-22407,2017
11. Self-rectifying bipolar resistive switching memory based on an iron oxide and graphene oxide hybrid
SI Oh, J.R Rani, SM Hong, JH Jang, Nanoscale 9 (40), 15314-15322, 2017
12. Reduced graphene oxide enwrapped phosphors for long-term thermally stable phosphor-converted white light emitting diodes
G Anoop, J.R Rani, J Lim, M.S Jang, DW Suh, S Kang, SC Jun, JS Yoo, Scientific Reports, 6, 33993,2016
13. Graphene Oxide-Oxynitride Hybrid Nanoscrolls for Supercapacitor Electrodes with Enhanced Specific Capacitance
J.R Rani, SeI Oh, J.M Woo, J.H Jang, Journal of The Electrochemical Society 163 (5), A677-A682, 2016
14. Raman Spectra of Luminescent Graphene Oxide (GO)-Phosphor Hybrid Nanoscrolls
J.R Rani, SI Oh, JH Jang, Materials 8 (12), 8460-8466,2015
15. Low voltage resistive memory devices based on graphene oxide–iron oxide hybrid
J.R Rani, SI Oh, J.M Woo, J.H Jang, Carbon 94, 362-368, 2015
16. Graphene oxide–phosphor hybrid nanoscrolls with high luminescent quantum yield: Synthesis, structural, and X-ray absorption studies
J. R Rani, Se-I Oh, Jeong Min Woo, Nilesh L Tarwal, Hyun-Woong Kim, Bongjin Simon Mun, Sungbae Lee, Ki-Jeong Kim, Jae-Hyung Jang, ACS applied materials & interfaces 7 (10), 5693-5700, 2015
17. Effect of copper surface pre-treatment on the properties of CVD grown graphene
MS Kim, JM Woo, DM Geum, J.R Rani, JH Jang, AIP Advances 4 (12), 127107,2014
18. Radio frequency based label-free detection of glucose
H Park, H.S Yoon, U Patil, Rani Anoop, J Lee, J Lim, W Lee, S.C Jun, Biosensors and Bioelectronics 54, 141-145, 2014
19. Structural and Optical Characterization of Pr2O3 and Yb Doped and Co-Doped Silicon Nanorings
J.R Rani, G Anoop, M Gopal, V Ganesan, V.P.M Pillai, Advanced Science, Engineering and Medicine 5 (8), 869-876, 2013
20. Terahertz, optical, and Raman signatures of monolayer graphene behavior in thermally reduced graphene oxide films J Lim, K Choi,
J. R Rani, J.S Kim, C Lee, J Hoon Kim, S Chan Jun, Journal of Applied Physics 113 (18), 183502, 2013.
21. Terahertz and optical study of monolayer graphene processed by plasma oxidation
Kyujin Choi, Juhwan Lim, J.R Rani, Hyong Seo Yoon, Juyeong Oh, Taeyoon Hong, Taewoo Ha, Byung Cheol Park, Kyung Ik Sim, Seong Chan Jun, Jae Hoon Kim, Applied Physics Letters 102 (13), 131901, 2013
22. Controlling the Luminescence Emission from Palladium grafted Graphene oxide thin films via reduction
J. R. Rani, J. Park, J. Lim, K. Kim, S.J.Kim and S. C. Jun, Nanoscale, 5, 5620 (2013)
23. Substrate and Buffer layer Effect on the Structural and Optical Properties of Graphene Oxide Thin Films.
J. R. Rani, J. Lim, J. Oh, J.-W Kim, H. S. Shin, J. H. Kim, S. Lee, and S. C. Jun
RSC Adv., 3, 5926 (2013 )
24. Luminescent silicon nanostructures via tin oxide doping
J.R Rani, VP MAHADEVAN PILLAI, G Anoop, M Gopal, V Ganesan
Nano 8 (01), 1350008, 2013
25. Epoxy to Carbonyl Group Conversion in Graphene Oxide Thin Films: Effect on Structural and Luminescent Characteristics.
J. R. Rani, J. Lim, J. Oh, J.W Kim, H. S. Shin, J. H. Kim, S. Lee, and S. C. Jun, J. Phys.Chem. C. , 116, 19010 (2012).
26. Optical modification of atomic-thickness graphene oxide
J. Lim, J. R. Rani, K. Choi, J.H. Kim and S. C. Jun, 13 November 2012, Proceedings of SPIE
DOI: 10.1117/2.1201210.004520
27. NH3 sensing properties of centimeter scaled CVD graphene in ambient condition
J. Lim, Rani Anoop, J.H. Kim, J. Yoon, H-R Ahn, S. Song, Y-J Kim, S.C. Jun Nanotechnology 2012: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational (Volume 2), 110-113
28. Effect of substrate structure on photoluminescence spectra of silicon Nanocrystals grown by off-axis pulsed laser deposition
J. R. Rani, V. P. Mahadevan Pillai, R. S. Ajimsha, R.S. Jayasree, and M. K Jayaraj J.Appl. Phys. 100, 014302 (2006)
29. Structural and non-linear optical properties of self-assembled SnO2 doped Silicon nanorings formed by Pulsed laser ablation
J. R. Rani, V. P. Mahadevan Pillai, C. S. Suchand Sandeep, and Reji Philp, Electrochemical and Solid-State Letters, 11 (8) K73-K77 (2008) (Selected for the June 2, 2008 issue of Virtual Journal of Nanoscale Science & Technology)
30. Laser-ablated SiC nanorods for optoelectronics applications
Detty, A.P., J.R Rani, Lethy, K.J., Mahadevan Pillai, V.P, 2010 International Congress on Ultra Modern Telecommunications and Control Systems and Workshops, ICUMT 2010, art. no. 5676536, pp. 846-847

Papers Presented (Conferences/Seminar / Workskhop)

  1. Optical properties of Graphene oxide, S. Song, J. Lim, K. J. Choi, J. R. Rani, J. H. Kim, S. C. Jun, SPIE 2012
  2. Tunable luminescence of Graphene Oxide Thin film by structural modification, J. Lim, J. R. Rani, and S. C. Jun, Nano Korea 2012 Symposium on Graphene Nanotechnology
  3. J. Lim, J. R. Rani, J. Oh, H.G. Park, H. S. Yoon, and S. C. Jun, KSME 2012 Nano-micro spring conference (Poster), J. Lim, J. R. Rani, J. Oh, Y. M. Jung, H. S. Yoon, H. Park, and S. C. Jun, Korea society of material science 2012 (ORAL)
  4. Silicon Nanoparticles Grown by Pulsed Laser Deposition, J. R. Rani, S.Barik , P.Misra ,T.A.Khan , A.K Sreevastava,C.M Negi,R.V Nandekar, Nanditha Dasguptha,,V.P.M Pillai,P.K sen, and L.M.Kukreja, Proceedings of 12th International Workshop of Physics of Semiconductor Devices (IWPSD ), Madras , December 2003
  5. Vibrational spectra of an Apatitic Calcium Phosphate Bone Cement, K.Jayakumar, J. R. Rani, Vinod Kumar , V.P Mahadevan Pillai and U.V Nayar, Annual Meeting of EMSI and Conference on Electron Microscopy and Allied Fields , April 2004 , organized by Electron Microscope Society of India and National Physical Laboratory , New Delhi
  6. Off axis pulsed laser deposition of silicon nanoparticles, J. R. Rani, R. S Ajimsha, R. Manoj, V. P. MahadevanPillai, M. K. Jayaraj, International Conference in Asia IUMRS-ICA2004 November 2004, Taiwan
  7. Optical Characterization of Si nanoparticles Prepared By Off Axis PLD, J. R Rani, R. S. Ajimsha, V.P.MahadevanPillai, M. K.  Proceedings of DAE _ BRNS National Laser Seminar ( NLS-4) January, 2005 , Mumbai
  8. Optical Characterization of Er-doped ZnO Thin Film Prepared By Off Axis PLD, J. R. Rani, R. S. Ajimsha, V.P.Mahadevan Pillai, M.K.Jayaraj, Proceedings of DAE -BRNS National Laser Seminar ( NLS-4) during the period January, 2005, Mumbai
  9. Photoluminescence Characteristic Of Silicon nanoparticles by PLD, J. R. Rani, R. S. Ajimsha, V. P. Mahadevan Pillai, M. K. Jayaraj Proceedings of National Conference on Luminescence and Applications (NCLA) , February 2005 Bangalore
  10. Photo luminescence studies of Er-doped ZnO Thin Film Prepared by Off Axis PLD, Vinodkumar.R, Rani J.R, Subodh G , K.G. Gopchandran and V. P. Mahadevan Pillai, R.S.Ajimsha and M. K. Jayaraj International Topical Conference in Applied Photonics,University of Calcutta and Applications (NCLA) , February 2005 , Bangalore
  11. Photoluminescence Charecteristics of Silicon nanoparticles, J. R. Rani and V.P.Mahadevan Pilali, Proceedings of XIV international materials   research congress (IMRC- 2005) Symposium 4:- solar cells & solar energy materials, August, 2000, Mexico
  12. Quantum confinement effect in Silicon nanoparticles grown by off axis PLD, J. R. Rani, R.S Ajimsha, V.P.Mahadevan Pilali, M.K Jayaraj Proceedings of XIV international materials research congress (IMRC- 2005) Symposium 4:- solar cells & solar energy materials, August, 2000, Mexico
  13. Bright Luminescence from Gadolinium doped Silicon nanoparticles prepared by off axis Pulsed    Laser Deposition J. R. Rani and V.P.Mahadevan Pillai, National Conference for pulsed laser deposition, November 7-9, Thirupaty, India
  14. Bright Luminescence from Gadolinium doped Silicon nanoparticles prepared by off axis Pulsed Laser Deposition, J. R. Rani and V.P.Mahadevan Pillai, International Conference on materials research congress (IMRC- 2006), Mexico
  15. Effect of ZnO and SnO2 doping on the optical properties of SiC thin films prepared using pulsed laser deposition
  16. A.P Detty, J. R. Rani, K. J.  Lethy, Reji Philp, V P Mahadevan Pillai, Best poster award for national Laser Symposium (NLS 2006), CAT, Indore.

Invited Lectures

Graphene – A wonder material :  Yonsei University ,South Korea, 2012

Electronic Devices based on Graphene: Gwangju Institute of Science and Technology, Gwangju, South Korea, 2013